The Hilti DPC 20 is a power conditioner (also referred to as a power supply unit or converter) designed specifically as an accessory for the Hilti DG 150 diamond concrete grinder. It converts standard alternating current (AC) from the mains power supply to provide stable, synchronized power to the DG 150's SR (soft-start rotor) motor, ensuring smooth operation for grinding tasks like removing coatings, adhesives, or leveling concrete/screed.Originally purchased to go with the power vac - Hilti VCD 50 (also for sale, sold separate)The VCD 50 is a high-performance industrial dry vacuum cleaner optimized for dust extraction during grinding and construction work. Both the DPC 20 and VCD 50 are components of Hilti's complete DG 150 floor grinding system (along with the grinder itself and dust bags), allowing for integrated, low-dust operation on job sites.